java 예외처리 -

import java.util.InputMismatchException;
import java.util.Scanner;
public class s3 {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        int num = 0;
        System.out.print("정수 입력 :  ");
        try {
            num = input.nextInt();
            if (num%3 == 0) {
                System.out.printf("=> %d -> r:0 \n", num);
            } else if (num%3 == 1) {
                System.out.printf("=> %d -> r:1 \n", num);
            } else {
                System.out.printf("=> %d -> r:2 \n", num);
            }
        } catch (InputMismatchException e) {
            System.out.printf("error message : %s\n", e);
        }

    }
}